Automatic auxiliary air control for gas-engines.



RLEYQ H. E. OLSEN.

AUTOMATIC AUXILIARY AIR CONTROL FOR GAS ENGINES.

f APPLICAUON FILED uns@ ma.

Il,()Q'TQELQLALI Patented May 26,191.4:4

` HANS E.

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vTo all whom it may concern:

vented new and useful Improvement auxiliary, engines.

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GEORGE RILEY AND HANS E. OLSEN,OF PETALUMA, CALXFORNA. y

AUTOMATIC AUXILIARY AIB CONTROL FOR GAS-ENGINES.

Specification of Letters Patent. Patgntd Mlgvy 26, `1914, Applicationfiled January 31, 1912.` Serial No. 674,597.

the gasolene or other volatile liquid and air is delivered to the pipe 2from any source of The customary throttle valve 4 is disposed in thepipe 2 between the carbureter 3 and the inlet to the cylinder by meansof which the quantity of the mixture introduced into the engine cylinderis regulated.

-The essence of this invention resides in disposing a peculiarlyconstructed, auxiliary air-inletdevice in the pipe 2 between thethrottle valve l and the inlet to the cylinder A, which device isdesigned for the purpose of admitting a quantity of air to the enginecylinder on the charging stroke, to increase the volume ofA air in theexplosive mixture delivered through the carbureter 3 and throttle valveA; and which is so constructed as to automatically regulate the quantityof airpassing therethrough in proportion to the quantity of theexplosivemixture passing through the throttle valve 4e; and which can beset to vary the proportions as circumstances require.

lThe Vair inlet valve constituting our. present invention isparticularly shownfin Figs. 2 and 3 of the drawing, and comprises acylindrical casing 5 tapered inwardly on its 'outer' periphery from itslower to its upper end. A threaded-nipple 6 is formed on the lower endof the casing 5 which is adapted to be screwed into the pipe 2, and theupper endof the casingv 5 is threaded to receive a cap 7.

A sleeve 9 is s lidably mounted on the ta- Gnonen Rumi' and OLsnN, bothcitizens of the United at Petaluma, in the county State of California,have ins in Auxiliary Air Control Jfor Gaswhich the following is aspeci- Be it known that we,

States, residing of Sonoma and Automatic Engines, o

This I'invention relates lto an automatic, air controlling rappliancefor gas of this invention to proair admission appliance the intake ofgas engines between the engine and carbureter, by means of which theproportions of air and gas in thc explosive mixture delivered to theengine cylinders, will be varied to suit ditlerent con ditions, such asare occasioned by changes in temperature and altitude, or other causes,-thereby maintaining a proper mixture at al times.

lAnother object is to provide means for admitting air to 'the enginecylinder on the working stroke ofthe engine piston, after the throttlevalve is closed, to form a cushion for the piston on its return stroketo retard act as a brake. A further object is to provide a device of theabove character which is simplein construction, eilicient in operation,inexpensive in manufacture, and not liable to get out of order.

Other objects, together with the advantages to be derived from the useof this invention, will v appear hereinafter.

The invention consists of the parts and the construction and combinationof parts, as hereinafter more`` fully described an lt is the object videan automatic for attachment to and contacting the outer claimed, havingreference to the accompanya series of perforations l2 and a verticallying drawings, in which 1 disposed slot 13 formed in the casing 5,A aslFigure lis a view in elevation of a four shown in Fig. 3; the levervarm 11u; being cylinder gas engine, withparts broken away, operatedthrough a connecting rod 14 from any desired point.

invention as applied. Fig. 2 is a vertical section of the elevation.Fig. 3 is an elevational viewlof. aroundthe casing 5 adjacent its upperend, same. Fi 4: is a plan view. which bears between an overlianginportion ln the drawings, A represents a gaslengine cylinder of anysu'tabl'e type and 2 indicates the intake or feed pipe'for delivering anexplosive mixture of gasolene and air to the interior of the cylinder atthe upper end thereof. A carbureter 3 of any desired constructionconnects with the pipe 2 in the usu'al well-known manner, through hich 9to normally retain the tapered inner surface of the sleeve in contactwith the tapered outer surface of the casing ing a close fit between thevsleeve and casing. The spring 15 thus acts to hold the sleeve 9 in itslowermost-position and on the casing v5, thereby 'cmpensating for Thesleeve 9 'is formed of the cap 7 and the upper end of t e sleeveperedexterior of the casing 5, with 'its linner An expansible spiral'spring15 is wound ios d 5', thereby insur- Wear of the contacting surfaces ofthe casing 5 and sleeve 9.,

Within thecasing 5 is a piston 16 which is loosely mounted on a stem 17extending through and guided in the cap 7. The piston 16 is normallyheld in its uppermost position in the casing 5 by means of a helicalspring 18 Wound onA thestem l7-and bearing between the upper end of thecap 7 and an adjustable collar 19 threaded on the upper end of the steml17 A lock nut 20 is screwed on the stem 17 above the collar 19 and isprovided for holding the collar 19 against being displaced.

The-piston 16 is provided as a means for automatically closing theperforations 1Q and slot 13 in the casing 5, or portions thereof, toregulate the quantity of air ad mitted to the interior of the casing 5,as will presently be described.. A pin 2l on the casing 5 acts on thevertical edges ot the slot 10 to limit the movement of the sleeve 9 ineither direction in opening or closing the perforations 12 and the slot.13.

ln the operation of this invention, when it is desired to increase thequantity of air in the explosive mixture discharged through thecarburetor 8 and throttle valve et, the sleeve 9 is turned te expose aportion of the perforations 12 through the slot 10; theextent of theexposure of the perforations 12 being varied according to the amount otair it is desired to deliver to the explosive mixture. .When a. smallquantity of air is desired, a few of thepcrforations 19 are opened, andwhen a large volume of air is required, the sleeve 9 is turned, to openall the perforations 12 and the slot 13. .'lhe air is drawn into thecasing 5 and from thence into the feed pipe 2, Where it mingles with theexplosive mixture when the throttle valve et is open, bythe suction ofthe engine piston on its down stroke, and is drawn into the enginecylinder A with the explosive charge in the usual manner, As mostcarbureters are improperly setfor proper proportions of air and gasoleneun'- der :varying conditions, the most common of which are changes inaltitude and temperature, the operations of the engine will varyaccordingly. By the use of this invention this diiiiculty is obviated,:tor when the engine is operating improperly, the at tendant adjusts thesleeve 9 to cause more or less air to be mingled with the explosive.mixture as the occasion may require. The

quantity of air mingling with the explosive mixture is governed by theopen areas oi the perforations 12 and theextent ot the opening of thethrottle valve 4+.; the latter controlling the speed of the engine. Thesmaller the open area of the throttle` valve 4, the greater will be thesuction of the engine piston, thereby increasing thel suction 111 thecasing 5 which tends to increase the volume of air drawn through theperi'ora tions 12.

It is desirable that the air passing through the perforations 12 shouldbe proportional to the mixture passing through the throttlc valve, andthis is accomplished by reason of the piston '16 Which operatesautomatically to close a. number of the perforations 12 when thethrottle si is partially closed; the piston 1C being drawn down by theincreased suction in the casing 5 in opposition to the spring 1S, thetension oi which is adjusted by means 01"' the flange 19 to suit theconditions. Vhen the throttle valve is opened to increase the speed oitthe engine piston, the suction in the casing 5 becomes less and thepiston 1G rises to let in a proportionately larger quantity of air. lVhen 'the throttle valve i is completely closed while the engine isrunning, a certain quantity of air is drawn into the engine cylinderthrough the pcrt'orations l2 or slot 13 on each down stroke of theeng'ne, and is conipressed on the 11p-stroke. iI`his action rctarde theengine movements and thereby acts as a brake. In this application of theinvention, the sleeve 9 may' be' turned to open the slot 13, Which willpermit of a quick inrush of a large volume of engine cylinder.

Having thus described our invention, what we claim and desire to secureby Let ters JPatent is l. An auxiliary air control for an intake pipe ofa engine comprising` a valve adapted to cooperated by engine suction,and manual means tor varying the amount ot air admissible through saidauxiliary air control,independent of said valve.

2. n auxiliary air control :icr an intake pipe of a gas enginecomprising a Valve adapted to be operated by engine suction, and manual.means for varying the amount of air admissible through said auxiliaryair control independent ci the Valve, said means including` a rotatablesleeve and a connec tion with the sleeve for operating said sleeve.

3. An automatic: air feeding device for gas engines, comprising a valveeasing` having air inlet openings, means exterior of the casing foropening` and closing the openings, and means on the interior of thecasing adapted to be operated by suction lfor closing the openings.

4. An automatic air, feeding device for engines; comprisinga casinghaving air inlet openings, manually operated means for air into theopening and closing said openings, and suc-- tion operated means :torclosing said .penings. l

a5. in automatic air feeding device for gas engines, comprising a casinghaving air inlet. openings, manually operated means Vfor opening andclosing said openings, suction Aoperated cans for closing said openings,

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l and means for adjusting said suction operated means.

6. An automatic air feeding device for gas engines, comprising a easinghaving air inlet" openings therein, means for attachingsaid casing tothe engine feed pipe, a sleeve formed with a slot revolubly mounted onsaid casing, meansfor rotating said sleeve to admit air to the interiorof the casing through the perforations in the casing and the slot in thesleeve, and suction operated means inside the casing for closing theperforations.

7. An automatic air 'feeding device for gas engines, comprising a casinghaving air inlet openings therein, means for attaching said casing tothe engine feed pipe, a sleeve formed with a slot revolubly mounted onsaid casin means for rotatin said sleeve z formed with a slot revolublymounted on said casing, means for regulating the frictional engagementof the sleeve with the casing, means for limiting the rotary movement ofthe sleeve, means for rotating said sleeve to admit air to the interiorof the casing through the perforations in the casing and the slot in thesleeve, and suction operated meang inside the casing for closing theperforations, including a piston, a stem on which the piston is mounted,and adjustable spring means for retracting said piston.

9. In a device of the class described in combination, a casing providedwith openings, a revoluble member provided with a slotted portion andadapted to rotate upon said casing, a piston withinrsaid casing and'adapted to open and close said openings,

and a spring tending to resist the movement of said piston to close saidopenings, substantially as described.

n testimony whereof We have hereunto set our hands in the presence oftwo subscribing Witnesses,

' GEORGE RILEY. HANS n. oLsnN.

Witnesses:

A. Roncnns, I 'W. C. RAYNEB.

mit

